/// <summary>
/// Calculate income tax for given salary and tax table
/// </summary>
/// <param name="salary"></param>
/// <param name="taxTable"></param>
/// <returns></returns>
public decimal CalculateIncomeTax(decimal salary, ITaxTable taxTable)
{
var taxBracket = taxTable.GetTaxBracket(salary);
if (taxBracket == null)
{
throw new TaxBracketNotFoundException(salary);
}
return(Math.Round(
(taxBracket.MandatoryTax + (salary - taxBracket.Minimum - 1) * (taxBracket.Rate / 100)) / 12
, 0
, MidpointRounding.AwayFromZero
));
}
/// <summary>
/// Combine salary calculations and produce a Payslip for an Employee
/// </summary>
/// <param name="employee"></param>
public string GeneratePayslip(EmployeeDetail employee)
{
var employeeName = $"{employee.FirstName} {employee.LastName}";
var taxBracket = _taxTable.GetTaxBracket(employee.Salary);
var incomeTax = _payCalculator.CalculateIncomeTax(employee.Salary, taxBracket);
var grossIncome = _payCalculator.CalculateGrossIncome(employee.Salary);
var netIncome = _payCalculator.CalculateNetIncome(grossIncome, incomeTax);
var super = _payCalculator.CalculateSuper(grossIncome, employee.SuperRate);
var payPeriod = employee.PayPeriod;
// Name, payPeriod, grossIncome, incomeTax, netIncome, super
var payslip = $"{employeeName}, {payPeriod}, {grossIncome}, {incomeTax}, {netIncome}, {super}";
return(payslip);
}
